/*
 * Copyright 1999-2018 Alibaba Group Holding Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.alibaba.nacos.naming.core.v2.event.service;

import com.alibaba.nacos.common.notify.Event;
import com.alibaba.nacos.naming.core.v2.pojo.Service;

/**
 * Service event.
 *
 * @author xiweng.yy
 */
public class ServiceEvent extends Event {
    
    private static final long serialVersionUID = -9173247502346692418L;
    
    private final Service service;
    
    public ServiceEvent(Service service) {
        this.service = service;
    }
    
    public Service getService() {
        return service;
    }
    
    /**
     * <h2>服务变更事件，会通知所有该 Service 服务应用的【所有订阅方】。</h2>
     *
     * Service data changed event.
     */
    public static class ServiceChangedEvent extends ServiceEvent {
        
        private static final long serialVersionUID = 2123694271992630822L;

        /**
         * <h2>服务变更事件，会通知所有该 Service 服务应用的【所有订阅方】。</h2>
         *
         * @param service
         */
        public ServiceChangedEvent(Service service) {
            this(service, false);
        }

        /**
         * <h2>服务变更事件，会通知所有该 Service 服务应用的【所有订阅方】。</h2>
         *
         * @param service
         * @param incrementRevision
         */
        public ServiceChangedEvent(Service service, boolean incrementRevision) {
            super(service);
            service.renewUpdateTime();
            if (incrementRevision) {
                service.incrementRevision();
            }
        }
    }
    
    /**
     * Service is subscribed by one client event.
     */
    public static class ServiceSubscribedEvent extends ServiceEvent {
        
        private static final long serialVersionUID = -2645441445867337345L;
    
        private final String clientId;
        
        public ServiceSubscribedEvent(Service service, String clientId) {
            super(service);
            this.clientId = clientId;
        }
    
        public String getClientId() {
            return clientId;
        }
    }
    
}
